连作对花生土壤酶活性、养分含量和植株产量的影响

通过盆栽试验,设置4个不同连作年限处理,研究连作对花生栽培种桂花17和野生种A.correntina土壤酶活性、养分含量和植株干物质产量影响的差异。结果表明:与对照相比,两个花生品种不同连作年限土壤有效养分含量和植株干物质产量均降低,A.correntina相比桂花17下降幅度小。桂花17各连作年限处理土壤的脲酶、转化酶、酸性磷酸酶活性随连作年限的增加有下降的趋势,处理间变幅大。而A.correntina各生育期土壤的脲酶、转化酶、酸性磷酸酶活性总体表现无一致性上升或下降的规律,处理间变幅小。两个花生品种在不同的连作年限间的过氧化氢酶活性的变化无规律性。连作条件下,花生野生种A.correntina的土壤理化和生物学性状的变化幅度更小。

Effects of Long-Term Continuous Peanut Cropping on Dry Matter Weight of Different Peanut Varieties, Soil Nutrient Contents and Enzyme Activities

A pot experiment was conducted to study the effects of continuous peanut cropping (0, 2, 4 and 6 years) on rhizosphere soil enzyme activities, soil nutrient contents and dry matter accumulation of cultivar Guihua17 and wild variety A. correntina. The results showed that with the continuous cropping year increase, compared with the control (no continuous cropping), soil available nutrient contents and dry matter accumulation were decreased, the decline in A. correntina was lower than Guihua 17,the activities of soil urease, invertase and acid phosphatase of Guihua 17 decreased, the activities of soil urease, invertase and acid phosphatase of A. correntina at various stages changed irregularly, and little difference occurred between different treatments. The activites of soil hydrogen peroxide enzymes of the two varieties also changed irregularly. Comparatively, the changes in soil physical and chemical properties, biological properties of wild speciesA. correntina was smaller than cultivars variety Guihua 17.